dt-bindings: phy: ti: phy-gmii-sel: convert bindings to json-schema

Convert the CPSW Port's Interface Mode Selection PHY bindings documentation
to json-schema.

Signed-off-by: Grygorii Strashko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring <[email protected]>

Author: grygoriyS

Documentation/devicetree/bindings/phy/ti,phy-gmii-sel.yaml

@@ -0,0 +1,104 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/phy/ti,phy-gmii-sel.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: CPSW Port's Interface Mode Selection PHY Tree Bindings
+
+maintainers:
+  - Kishon Vijay Abraham I <[email protected]>
+
+description: |
+  TI am335x/am437x/dra7(am5)/dm814x CPSW3G Ethernet Subsystem supports
+  two 10/100/1000 Ethernet ports with selectable G/MII, RMII, and RGMII interfaces.
+  The interface mode is selected by configuring the MII mode selection register(s)
+  (GMII_SEL) in the System Control Module chapter (SCM). GMII_SEL register(s) and
+  bit fields placement in SCM are different between SoCs while fields meaning
+  is the same.
+                                               +--------------+
+        +-------------------------------+      |SCM           |
+        |                     CPSW      |      |  +---------+ |
+        |        +--------------------------------+gmii_sel | |
+        |        |                      |      |  +---------+ |
+        |   +----v---+     +--------+   |      +--------------+
+        |   |Port 1..<--+-->GMII/MII<------->
+        |   |        |  |  |        |   |
+        |   +--------+  |  +--------+   |
+        |               |               |
+        |               |  +--------+   |
+        |               |  | RMII   <------->
+        |               +-->        |   |
+        |               |  +--------+   |
+        |               |               |
+        |               |  +--------+   |
+        |               |  | RGMII  <------->
+        |               +-->        |   |
+        |                  +--------+   |
+        +-------------------------------+
+
+  CPSW Port's Interface Mode Selection PHY describes MII interface mode between
+  CPSW Port and Ethernet PHY which depends on Eth PHY and board configuration.
+  |
+  CPSW Port's Interface Mode Selection PHY device should defined as child device
+  of SCM node (scm_conf) and can be attached to each CPSW port node using standard
+  PHY bindings.
+
+properties:
+  compatible:
+    enum:
+      - ti,am3352-phy-gmii-sel
+      - ti,dra7xx-phy-gmii-sel
+      - ti,am43xx-phy-gmii-sel
+      - ti,dm814-phy-gmii-sel
+      - ti,am654-phy-gmii-sel
+
+  reg:
+    description: Address and length of the register set for the device
+
+  '#phy-cells': true
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - ti,dra7xx-phy-gmii-sel
+              - ti,dm814-phy-gmii-sel
+              - ti,am654-phy-gmii-sel
+    then:
+      properties:
+        '#phy-cells':
+          const: 1
+          description: CPSW port number (starting from 1)
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - ti,am3352-phy-gmii-sel
+              - ti,am43xx-phy-gmii-sel
+    then:
+      properties:
+        '#phy-cells':
+          const: 2
+          description: |
+            - CPSW port number (starting from 1)
+            - RMII refclk mode
+
+required:
+  - compatible
+  - reg
+  - '#phy-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    phy_gmii_sel: phy-gmii-sel@650 {
+        compatible = "ti,am3352-phy-gmii-sel";
+        reg = <0x650 0x4>;
+        #phy-cells = <2>;
+    };